|
I agree - RE's are really the wrong tool for this job, unless your lecturer/tutor is insisting you use them (although I'd be wondering why).
You say you're "not into compiler design yet" on your course, but I presume it's coming up eventually, and when it does you don't want to start off down the wrong road.
There are three kinds of people in the world - those who can count and those who can't...
|
|
|
|
|
Do you know any good source that i can read about parse tree?
|
|
|
|
|
Google 
Regards
David R
---------------------------------------------------------------
"Every program eventually becomes rococo, and then rubble." - Alan Perlis
|
|
|
|
|
hehehe....i'm doing it right now...but i can't determine if that source is good or not...
|
|
|
|
|
http://en.wikipedia.org/wiki/Parsing[^]
THis looks useful - got by googling 'parse tree compiler' 
Regards
David R
---------------------------------------------------------------
"Every program eventually becomes rococo, and then rubble." - Alan Perlis
|
|
|
|
|
I am implementing a SerializationBinder.
In public override Type BindToType(string assemblyName, string typeName) I am passed type name such as:
<code>System.Collections.Generic.Dictionary`2[[System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.String, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]</code>
Which I like to decompose in:
typename: System.Collections.Generic.Dictionary
2 generic type argument
assembly: mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
typename: System.Int32
assembly: mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089
typename: System.String
Is there some utility class which will do that for me?
Or an article with some parser?
Any link?
A train station is where the train stops. A bus station is where the bus stops. On my desk, I have a work station....
_________________________________________________________
My programs never have bugs, they just develop random features.
|
|
|
|
|
Well, I'm a complete beginer with Irony ( Irony[^] ),
so I don't know if I would manage to do something with it.
Nonetheless it is so easy to use that I was able to guess / write this following type name parser in 90 minutes...
[Language("Type FullName", "1.0", "serialization type name")]
public class TypeNameGrammar : Grammar
{
public TypeNameGrammar()
: base(true)
{
var typeName = new NonTerminal("TypeName");
this.Root = typeName;
var ident = new IdentifierTerminal("identifier");
var number = new NumberLiteral("number", NumberFlags.IntOnly);
var token = new IdentifierTerminal("token", "0123456789", "");
var optionalGenericType = new NonTerminal("GenericPart");
var optionalAssembly = new NonTerminal("Assembly");
var typeParameters = new NonTerminal("TypeParameters");
var fullName = new NonTerminal("fullname");
var aversion = new NonTerminal("aversion");
var acult = new NonTerminal("acult");
var atok = new NonTerminal("atok");
typeName.Rule = fullName + optionalGenericType + optionalAssembly;
optionalGenericType.Rule =
Empty
| Symbol("`") + number + "[" + typeParameters + "]";
optionalAssembly.Rule =
Empty
| Symbol(",") + fullName + "," + aversion + "," + acult + "," + atok;
typeParameters.Rule =
typeParameters + "," + "[" + typeName + "]"
| Symbol("[") + typeName + "]";
fullName.Rule =
fullName + "." + ident
| ident;
aversion.Rule = Symbol("Version=") + number + "." + number + "." + number + "." + number;
acult.Rule = Symbol("Culture=") + ident;
atok.Rule = Symbol("PublicKeyToken=") + token;
}
}
A train station is where the train stops. A bus station is where the bus stops. On my desk, I have a work station....
_________________________________________________________
My programs never have bugs, they just develop random features.
|
|
|
|
|
[Language("Type FullName", "1.0", "Generic type name")]
class TypeNameGrammar : Grammar
{
public TypeNameGrammar()
: base(true)
{
var typeName = new NonTerminal("TypeName");
this.Root = typeName;
var ident = new FreeTextToChars("identifier", ",[]` ");
var aname = new FreeTextToChars("AssemblyName", "]");
var number = new NumberLiteral("number", NumberFlags.IntOnly);
var optionalGenericType = new NonTerminal("GenericPart");
var optionalAssembly = new NonTerminal("Assembly");
var typeParameters = new NonTerminal("TypeParameters");
typeName.Rule = ident + optionalGenericType + optionalAssembly;
optionalGenericType.Rule =
Empty
| Symbol("`") + number + "[" + typeParameters + "]";
optionalAssembly.Rule =
Empty
| Symbol(",") + aname;
typeParameters.Rule =
typeParameters + "," + "[" + typeName + "]"
| Symbol("[") + typeName + "]";
this.RegisterPunctuation("[", "]", "`", ",");
}
class FreeTextToChars : Terminal
{
private char[] stopChars;
public FreeTextToChars(string name, string chars)
: base(name, TokenCategory.Literal)
{
stopChars = chars.ToCharArray();
}
public override Token TryMatch(CompilerContext context, ISourceStream source)
{
var next = source.Text.IndexOfAny(stopChars, source.PreviewPosition);
if (next == -1)
{
string token = source.Text.Substring(source.PreviewPosition);
source.PreviewPosition = source.Text.Length;
return source.CreateToken(this, token);
}
else
{
string token = source.Text.Substring(source.PreviewPosition, next - source.PreviewPosition);
source.PreviewPosition = next;
return source.CreateToken(this, token);
}
}
}
}
A train station is where the train stops. A bus station is where the bus stops. On my desk, I have a work station....
_________________________________________________________
My programs never have bugs, they just develop random features.
|
|
|
|
|
Hi all,
In my solution I already have lots of business object unit tests. However I also want to test the web service layer. So to do this I've added another project to the solution and added a project reference to the web service layer. So now I can see all the web methods.
The problem I have is that when I want to go to the database my method GetDAOFactory() always returns null. I think this is because the global file inherits the HttpApplication class. E.G.
Try and get the customer or create a new one
1)
private Customer GetCustomerInSession()
{
Customer customer = Session[PropertyCustomer] as Customer;
if (customer == null)
{
Session[PropertyCustomer] = customer = new Customer(GetDAOFactory());
}
return customer;
}
Get the DAO Factory this returns null
2)
private IDAOFactory GetDAOFactory()
{
return Application[Global.DAOFactorySetting] as IDAOFactory;
}
I think the reason is because global inherits HttpApplication
3)
public class Global : HttpApplication
{
protected void Application_Start(object sender, EventArgs e)
{
// create data access implementation
string connectionString = System.Configuration.ConfigurationManager.ConnectionStrings["DevBox"].ConnectionString;
Application[DAOFactorySetting] = new ADODAOFactory(ProviderType.SqlServer, connectionString);
}
protected void Application_End(object sender, EventArgs e)
{
}
public static readonly string DAOFactorySetting = "DAOFactory";
}
Any ideas why its returning null?
I've thought of one solution and that would be to change the reference to a web reference. The only problem then is that I would either have to add a localhost web reference which wouldn't work with the CI build. Or to reference the published development app layer, but that would mean that when I change my code I wouldn't be able to test it until it was committed!!
Any help would be greatly appreciated. I'm using C#.Net 2.0 with NUnit 2.4.7
Phil
P.S. I've copied the connectionString DevBox to the App.config in the WebServiceTests project so that it can see it.
|
|
|
|
|
An odd question but i have an interface which recieves a byte array of 1024 bytes from another device.
Byte Number Page Column
0 to 127 0 0 to 127 // bottom right
128 to 255 1 0 to 127
256 to 383 2 0 to 127
384 to 511 3 0 to 127
512 to 639 4 0 to 127
640 to 767 5 0 to 127
768 to 895 6 0 to 127
896 to 1023 7 0 to 127 // top left
Does anyone know if i can somehow convert these bytes to be represented in the text box on the GUI.
1023 896
895 768
767 640 // screen layout
639 512
511 384
383 256
255 128
127 0
Thanx in advance
|
|
|
|
|
maybe something like...
TextBox1.Clear();
for(int i = 1023; i >= 0; i--)
{
TextBox1.Text += ByteArray[i] + " ";
if(i % 128 == 0)
TextBox1.Text += System.Environment.NewLine;
}
...make sure you textbox supports multiline and that should work. Also you would be better using a StringBuilder[^].
Life goes very fast. Tomorrow, today is already yesterday.
|
|
|
|
|
well i have a string which contains a unix timestamp.
when i try to convert the string to either a double or a int, it gives me an error.
im out of ideas, i dont know how to get the string into a int or double, so i can convert it from unix to datetime.
here is my code:
string validstrStart = "validuntil=";
string validstrEnd = "username=";
int validstartIndex = result.IndexOf(validstrStart);
int validendIndex = result.IndexOf(validstrEnd);
string valid = result.Substring(validstartIndex, validendIndex - validstartIndex);
double timestampv = Convert.ToDouble(valid);
System.DateTime dateTime = new System.DateTime(1970, 1, 1, 0, 0, 0, 0);
dateTime = dateTime.AddSeconds(timestampv);
string validpro = dateTime.ToShortDateString() + " " + dateTime.ToShortTimeString();
it gives me an error in this line:
double timestampv = Convert.ToDouble(valid);
same thing when i try with an int.
any help please
|
|
|
|
|
I guess a unix timestamp is neither in the form of an int or a double. What does it look like ?
Christian Graus
Driven to the arms of OSX by Vista.
Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.
|
|
|
|
|
an example is:
1241771674
this is the unix timestamp of the date right now.
all of them are integers, and i think doubles as well.
so yeh :S
i dont know why its not working
|
|
|
|
|
I suspect you will find that's bigger than the maximum value for an int. So, try using long and see how that goes. I'm not sure what the max value for a long is.
Christian Graus
Driven to the arms of OSX by Vista.
Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.
|
|
|
|
|
but you cant convert a string to a long.
remember, i need to convert the string into a int/long/double whatever, but i keep getting errors
|
|
|
|
|
iNutR wrote: but you cant convert a string to a long.
What on earth makes you think that ?
iNutR wrote: remember, i need to convert the string into a int/long/double whatever, but i keep getting errors
int.Parse and long.Parse can both return the number you gave me. So, can Convert.ToInt32, or Convert.ToIn64. Convert.ToInt16 gives an over flow error.
The maximum value of int is 2147483647.
Perhaps you need to tell us the exact error you're getting, because converting these numbers to int or long works just fine.
Christian Graus
Driven to the arms of OSX by Vista.
Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.
|
|
|
|
|
sorry, my bad.
when i try to convert to an int or a long, i get this error, however the program debugs fine, just when i click the cmd button to do the action, it get this error:
http://i26.tinypic.com/4zvvwz.png[^]
i have no idea what im doing wrong ^^
|
|
|
|
|
The string cannot be a number when that error is thrown. Try using int.TryParse or long.TryParse, to give your code a chance to recover when it gets bad input
Christian Graus
Driven to the arms of OSX by Vista.
Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.
|
|
|
|
|
use the watch window to see what is in valid - or the locals window
Weight loss Target
Weight at start [1/Feb/2009] 127kg
Weight now [31/Jul/2009] 107.7kg
Target weight : 80kg
Only 28 TO go hope to be there by March Wish me luck!
|
|
|
|
|
try double.Parse("1241771674");
|
|
|
|
|
im still getting the same error as posted :S
|
|
|
|
|
Try adding code to catch the error and show you the string that caused it, so you can confirm that it's not a number. It plainly is not a number, it must have some extra characters in it that are causing it to break.
Christian Graus
Driven to the arms of OSX by Vista.
Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.
|
|
|
|
|
thanks alot!
you just reminding me of something that fixed it
thanks
|
|
|
|
|
Please can you share what fixed it?
Weight loss Target
Weight at start [1/Feb/2009] 127kg
Weight now [31/Jul/2009] 107.7kg
Target weight : 80kg
Only 28 TO go hope to be there by March Wish me luck!
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
